Coding the bicycle frame to prevent bike theft.

Among other possibilities, like the use of protected boxroom, or the use of three locks (lock for frame/front wheel, frame/back wheel and frame/fixed object like a lantern or similar object) a good way to protect a bike is to cut a code on the frame. With this code it is possible to determine its legal owner after a theft.

In the photo you see a German coding. Unfortunately the coding is not standardized all over the world, so that every country has its own typical coding. That's why this system is only userful within a nation. In the global scheme of thinks, it is suitable to only a limited extent.